com.hazelcast.org.apache.calcite.rex.RexExecutor Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.org.licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.org.apache.calcite.rex;
import java.util.List;
/** Can reduce expressions, writing a literal for each into a list. */
public interface RexExecutor {
/** Reduces expressions, and writes their results into {@code reducedValues}.
*
* If an expression cannot be reduced, writes the original expression.
* For example, {@code CAST('abc' AS INTEGER)} gives an error when executed, so the executor
* ignores the error and writes the original expression.
*
* @param rexBuilder Rex builder
* @param constExps Expressions to be reduced
* @param reducedValues List to which reduced expressions are appended
*/
void reduce(RexBuilder rexBuilder, List constExps, List reducedValues);
}